Deaerating apparatus



Sept. 1, 1925.

J. R. M DERMET DEAERATING APPARATUS Fi le d Jan. 12, 1923 water.

Patented Sept. 1 1925. I

UNITED STATES PATE NT; OFFICE;

JOHN a. nominal, or 'Jnamrn'rrn, rENNsYLvaNIA, 'assrcmo'n 'ro nnrro'r'rcoxra w, or PITTSBURGH, rmmsynvama, a conroaa'rron or rnnnsxLwi-m.

msannarmo arramrns.

I Application filed Ianuary 12, 192$ Serial No. 612,861.

To all whom it may concern: V

Be it known that 1 JOHN R. MoDnR'Mm,

a citizen of the United States, residing at Jeannette, Vestmoreland'County, Pennsylvania, have invented a new and useful. Im 'rovement inDeaer ating Apparatus, of

wlnch the following is a full, clear, and exact description.

'The present invention relates broadlyto' i eat exchange apparatus fortreating water, and more particularly to a deaerating apparatus.

It is highly desirable, as recognized in the of-the water is'mlnimizedinaccordance with the degree of air separation, and the scale andincrustation -forming properties are likewise greatly reduced.

At the present time, one method of effecting the desired'release of airinvolves the bubbling of steam through a body of stored This storedwater may advantageously be contained in-a feed water heater of I anywellv known type.

- heated water.

my broader claims. I

Considerable .difficulty has been experienced, however, in the controlof both the heating steam and the agitating steam which bubbles throughthe these operating difliculties and provides an apparatus embodyingcontrolling means for both the steam and the water whereby the desiredamounts for proper operation may be continuously and automaticallymaintained. w

In the' accompanying drawings, there is shown more or lessd1'agrammaticallyfor purposes of illustration only, one embodiment ofthe present invention, it being understood that the drawings do'notdefine the limits of the invention and that changes may be made in theconstruction and operation disclosed therein 'without departing fromthespirit of-the invention or scope of In the draw ngs,

Figure 1 is a diagrammatic'view, partly-in section and view on .anenlarged scale of a the float controlling mechanism;

This invention A overcomes ven-tion, there is provided a feed water theillustrated embodiment of the I heater 2 of the open type having in itsup- 'per portion an inlet 3 for: the water to treated. This wateris'adapted to flow in cascade over a series of a itating pans 4 wherebyit is effectively brol xen up to facilitate the partial release of airand gases therefrom and to permit the more rapid heating of the water,The water may conveniently be supplied to the heater through a con--denser 5 having the usual inlet 6, and having its outlet ,7 connected tothe inlet of the feed 7 water heater. Also, as is customary in this art,the supply of ,water may be automatically controlled in ,accordance'withthe 'requirements on the apparatus b providing a float-operated ,valveSactuated y the-Water levelwithin the heater.

Heatingsteam for the entering water may be supplied through a steaminlet 9 fed by a manifold 10 which in turnreceives its sup ply from alive or exhaust steam'inlet 11.

The passage of steam from the manifold 10, to the inlet-9 is controlledbyiadifferen tially unbalanced valve 12 whereby the quantity of theheating steam at the inlet 9 may vary with respect to'the steam pressurein the manifold 10 as will bemore fully pointed out hereinafter.

Locatedbeneath the surface of the water,

injthe feed'water'heater is an agitating means which may convenientlycomprise a.-

series ofnozzles 13 commumcating with a c'ommon- -hea'der 14 towhichste'am' is :supplied through a branch 15 from the mani' fold 10."It willbe apparent that if the re- ".tionoft-he water whereby release ofair and other gases is efl'ected both by flotation and Y heatin'g, the;pressure of the steam on the hydrostatic head of the water on thenozzles.

1 and mustobvious'ly be greater than the presarty broken away,illustrating one embo" iment of the invention, and-Figure 2 is 'a'detail Pm a iib sure of thef'heatin steam within'the upper portion ofthe fee water heater. This difquired steam pressureis' maintained on theI nozzles 1-3, steam will continuously bubble the desired bubblingacnozzlesl3 must be sufiicient'to overcome the desired construction,herein illustrated specifically as embodying the -valve12.

As the level of the water in the feed water heater variesthefdifierential pres sure may also vary, ecreasing as the hydro--static head of the water decreases and increasing as the-Iwater leveland the head created thereby increases. For effecting this controlautomatically there may. be

heater. At its outer end it may be offset to provide an arm 19 which isin turn con-v nected by a'link with a lever .21. This lever 21, may beoperatively connected to the.

1 valve 12 inany desired manner whereby as the water level within-thefeed water heater lowers theva-lvewill beopened to provide additionalsteam for heating purposes 1n the upper portion of'the feed waterheater,

and asthe water level rises the valve 12 will be moved toward closedposition to restrict the amount of heating steam; In. this'manner, thedesired differential ressure is auto- ;matically varied as the eectivehead of water on the nozzles 13 varies, and -the 'sup-- ply ofheating Steam is maintained proportionate to the volumeof enteringwater.-

-' The usual overflewcomiection 22, together with an outletconnection-23 ier the treated "water may both'be provided.

In some cases, it may be desirable tojoperate the feed water heater at atemperature corresponding to a pressure which s below atmosphericpressure.

In such cases the condenser 5 will tend to withdraw the released vaporsand gases from'the. heater 2 and will thereby maintain the desiredthermal conditions within the heater. "It will be understood that thearticular design, of the condenser may be c anged in accordancewithconditions under which it is desired to operate the heater.Non-condensi'ble gases through the outlet 24 in any desired man ner, as.by an ejector (not shown). By utilizing sucha condenser not only; arethe desired thermal conditions maintained within "the heater, but thesensiblev heat of the released vapors and gases is conserved and.

imparted to' the incoming. water whereby it .is partiallypreheated."

When operating the heater undersubatmospheric conditionsyasjustdescribed, it

will be obvious that there may existwithinf within the manifold 10transmitted to the steam sup ly 11. If such conditions were maintaineline'll', there'would bea pro-; vided afloat 16'carried bya rod 17rotatably mounted in a suitable stulfing' box 18 and extending outwardlythrough the feed water" sures maybe --made possible.

may be withdrawn from the condenserlecorresponding tendency toward airinfiltration which would not only contaminate the Water but would impairthe efliciency of the heater. In order to prevent such an undesirablecondition within the steam supply line, there may be provided a balancedvalve structure 25' having a piston or diaphragm 26 which is subjectedon one side to atm0s-- pheric pressure through the'port 27 and ontheother side to manifold pressure through the passage 28. The manifoldpressure may be adjustably augmented by a loading sprin '29, whereby thedesired operating cond 'tions of the valve are insured. ln this manneratmospheric or sup'eratmospheric conditions may be maintained in thesteam supply line. 11 irrespectiveof the conditions existing'within theheater 2 and the manifoldlO.

With contemplated developments in the I art,the use'of a balanced valvein the steam supply line may be rendered unnecessary as the supply ofsteam at-sub-a-tmospheric presunderstood, therefore, that while such avalve is both necessary and desirable in oer-.-

tain installations, the operationof the present apparatus is notnecessarily dependent thereon incertain cases.

In operation of the heater, although the amount of steam supplied forheating pur-' poses varies in accordance with demands on zone of-theheater will obviously remain substantially constant thereby. making itnecessary to only consider the variation in the water level indetermining the essential pressure on the nozzles 13. I

It will be p the heater, the pressure within the heating I v Theadvantages ofthe present invention I arise from the provisionof a feedwater --heater efiective for deaerating the water and in which the suply o-fbothsteam and water may. be eflicient y controlled. p I claim1 1. In a. water treating apparatus, a feed water heater having a sourceof heatingv .steam, means for supplying agitating steam below the levelof waterin the heater, and

means operable in. accordance with condi- "tions, within the heaterformaintainin the of theheating an the desiredpre'ssure both agitatingsteam.-

Y 2. "InaEwater treatingapparatus, a feed waterlieater having a sourceof heating" steam means for supplying agitating vsteam below thelevel-of water in the heater, and

-means operable in accdrdance with conditions within the heater andmaintaining the desired difl'erential steam pressure to insure thebubbling of the agitating steam through the water.

B. In a water treating apparatus, a feedwater, heater having a source ofheating,

steam, means for supplying agitating steam below the level of water inthe heater, and 1 float controlled means for maintaining'thedesired.differential-steam pressure between the heating andthe'agitating steamh 4, Ina water treating apparatus, a feed .water,"heater having a source of heating steam, means for supplying agitatingsteam below the level of water in the heater, and a differential valvefor maintaining the desired difl'erential pressure between the heatingand the agitating steam to insure bub-,

bling of the agitating steam through the water, and means forautomatically operat- ,xing said valve.

5. Ina water treat ng apparatus, a feed water heater, meansfor'supplying heating steam to said heater above the level of watertherein, means for supplying agitating steam below the level'o f watertherein, and means steam below the level of water therein, means i .formaintaining a differential pressure be;

tween the heating'and agitating steam to insure bubbling of theagitating steam through thewater irrespective of the water level withinthe heater.

6. In, a water treating apparatus, a feed water heater, means forsupplying heating steam to said heater above the level of water therein,means for supplying agitating maintaining a differential pressurebetween the heating and agitating steam varying in accordance with theamount of water supplied to the heater to insure bubbling of theagitating steam through the water, and a common source-of supply forboth the heat- .ingiand the agitating steam.

7. In an'open feed water heater, means for supplying water thereto,means for supplying a differential steam pressure. above and below thesurface ofthe water therein,

I supplying water thereto, means'controlled by the pressuredifier'ence'being sufiicient to force-steam from below the water-intothe zone of pressure thereabove, and means forvarying said difference asthe water level within the heater varies.

8. In anopenfeed waterlieater, means for the water beingheated forsupplying a differential steam pressure above an below the surface 10fthe at, therein, the pressure difference being suflicient to force steamfrom below the water into'the zone of pressure thereabove, and a commonsource of supply for said steam. 1 I

9. In an open feed water heater, means for supplying water "thereto,'andfloat con,- trolled means for supplying'a difl'erential steam pressureabove and below the surface of the water therein, the-pressuredifference- I the source of supply irrespective of thepreS- sureconditions within the heater. 11. In an open feedwater heater, meansplying differential steam pressure above and below the surface of thewater therein, a sourceof supply for' said steam, and means -formaintaining a pressure at least atmospheric in the source of-steamsupply when the pressure within the heater is below atmospheric. v

'- 12. In a feed water heater, a source of steam supply, and afloat-controlled differential pressurevalve for, supplyinga-difi'erenxfor supplying water thereto, means for suptial. steampressure from said source above and below the surface of the waterwithin the heater. 1 a f 13. Ina feed water heater, a source of steamsupply, a diflerential pressure valve for supplying a differential steampressure from said source above and below the surface of the waterwithin the heater, and means for maintaining substantially constant ex?ternal pressure conditlons in said source of In testimony whereof Ihavehereunto set my hand. 7 a 4 JOHN MCDERMET.

' steam supply irrespective'ofpressure condi- I ,tions within theheater. f

